<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        /* h-shadow:水平方向 */
        /* v-shadow：垂直方向 */
        /* blur：模糊的大小 */
        /* color：阴影的颜色 */
        .demo{
            width: 100px;
            height: 100px;
            text-align: center;
            line-height: 100px;
            box-shadow: 10px 1px 10px black;
        }
    </style>
</head>
<body> 
    <div class="demo">
        慕课网
    </div>
</body>
</html>